JPH05339984A - Extrusion-molded cement board with trussed reinforcement - Google Patents

Abstract

PURPOSE:To make structure simple and lightweight, while making attachment easy. CONSTITUTION:A trussed reinforcement 12 is made up by welding linear round bars 121, 122 and 123 to each of top parts and end parts on both sides of round bars 124, 125 and 126 that are bent to form triangles. In putting such trussed reinforcement 12 into a dovetail groove provided to a cement board, two sides that extend, separating from each other, from each of the top parts of the triangles are thrust toward the inside from both sides, making the distance between the tail ends of the two sides narrowed, and the tail ends of the round bars forming the two sides are inserted into the dovetail groove. In other ways, the trussed rainforcement and a dovetail tenon are fixed to the cement board through fixing members, or the trussed reinforcement is fixed with fixing members having projections connected to vertical reinforcements and fixing members having projections and available for tightening by bolts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded cement board for forming a concrete formwork for a building, and more particularly to an extruded cement board having a mounting member that can be directly attached to a reinforcing bar. ..

[0002]

2. Description of the Related Art Conventionally, as a formwork structure generally used in a formwork construction method for buildings or the like, plywood for concrete, usually plywood called a control panel, has been used. For example, as shown in FIG. 5, the control panel 3 is reinforced by a splint 2 or the like to be panelized, and after the formwork panel 1 is marked out, a hole for a separator is punched and a side wall 8 is built. Next, after the separator 6 is attached and the reinforcing bars 7 are arranged, the return wall 9 is installed. Further, a thick pipe 4 is attached and fixed by using a form fitting 5, so that a form structure is formed.

[0003] Such wooden formwork construction has the problems of a decrease in carpenter carpentry and aging, and in recent years, it has been put under the conditions of labor saving of formwork construction, reduction of construction cost, shortening of construction period, etc. Furthermore, global environmental problems have been highlighted, and problems such as the conservation of forest resources and the reduction of wooden formwork that becomes industrial waste have grown.

Then, a new formwork construction method appeared in place of the wooden formwork. For example, it is known to use a plastic material in place of the wooden form. Further, recently, a cement board has been used, and in the case of using this cement board, it is not necessary to remove the cement board after placing the cement, which is preferable in that the above problems can be solved. Is.

[0005]

However, in the case of using this plastic, the problem of decrease in carpenter carpenter's age and aging, labor saving in formwork construction, reduction of construction cost, shortening of construction period, and industrial disposal. It is impossible to solve problems such as reducing the number of molds used as materials. Therefore, recently, a cement board is used, and it is not necessary to remove the cement board after placing the cement in the case of using the cement board, which is preferable in that the above problems can be solved. It is a thing.

However, when the cement board is used, it is necessary to attach the cement board to the formwork or the reinforcing bar, and therefore the attachment member has to be attached. Therefore, the present inventors have conducted various studies on this mounting member, found some preferable structures, and completed the present invention here. Therefore, the problem to be solved by the present invention is to provide an extruded cement board which is lightweight and has a simple structure and which is easy to install.

[0007]

Means for solving the problems of the present invention are achieved by respective inventions comprising the following constitutional requirements (1) to (3).

(1) An extruded cement board comprising a cement plate having at least one strip-shaped dovetail-shaped recess on the back surface and a truss bar attached to the dovetail-shaped recess. (2) The extruded cement board according to the above-mentioned item 1, wherein the truss muscle and the dovetail member are fixed via a fixing member. (3) The extrusion-molded cement board according to the above-mentioned item 1, wherein the truss muscle is fixed by a fixing member having a projection connected to the longitudinal stripe and is fixed by a fixing member having a projection and capable of being bolted.

The present invention will be described in more detail below. In the present invention, since the truss bar is used as the attachment member, it is possible to obtain an extruded cement board having a lightweight and simple structure and easy to attach. Further, according to the present invention, since the truss muscle is fixed via the dovetail member, it is possible to obtain one more sufficiently fixed to the cement plate.

The cement board used in the present invention is manufactured by using an ordinary cement raw material, and preferably has a dovetail-shaped recess on the back surface of the cement board. The truss bar used in the present invention is a linear bar assembled in a triangle, and the bottom side thereof is engaged with the dovetail-shaped recess of the cement board or is fixed to the cement board via a connecting member. It

The size of the cement board can be any desired size, but the width is usually 600 mm to 1000 m.
m, length 2000 mm-3000 mm, thickness 25 mm-
A 50 mm one is used.

[0012]

In the present invention, since the truss bar is used as the mounting member, it can be easily mounted by pushing the two sides of the triangle inward. It is also lightweight and has a simple structure. Further, even when the truss streak is fixed via the dovetail member, it is easy to fix the dovetail member by sliding it from the side surface of the cement plate and then fitting it.

[0013]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

EXAMPLE FIG. 1 shows a side cross-sectional view of a cement board having truss bars. An extrusion-molded cement board 11 having a width of 600 mm and a length of 1800 mm is provided with a dovetail-shaped recess 13 on the back surface. The truss muscle 12 is engaged with the dovetail-shaped recess 13. The truss 12 is shown in perspective view in FIG. Triangle-shaped round bars 124, 125, 126 and 127 are provided with straight round bars 121, 1 at both ends of the top and bottom sides.
22 and 123 are welded.

When the truss bar 12 is to be engaged with the dovetail groove-shaped recess 13 of the cement plate 11, the two sides of a triangle formed so as to be divided into two from the top are pushed inward to be contracted, and a contracted round bar. Both ends of the are fitted into the dovetail-shaped recesses 13 of the cement plate 11. After that, by releasing the hand, it is restored and engaged. For attachment to another cement plate, the truss bar 12 may be slid from the side surface of the cement plate 11 and inserted into the dovetail-shaped recess 13.

FIG. 3 shows another example of attachment of truss bars, in which five truss bars 12 are first attached to a cement plate 11. Two transverse bars 120, 120 at the bottom of the truss 12 are welded to the longitudinal bar 16. Also vertical lines 16
Two vertical stripes 16 are welded to each other via a fixing member 15 that can be bolted.

On the other hand, the cement board 11 has a dovetail member 14
Is slid from the side surface of the cement plate 11 and inserted into the dovetail groove-shaped recess 13, and then the dovetail member 14 and the fixing member 15 between the vertical lines 16 are fixed with bolts. This ant foot member 1
4 may have the same length as the dovetail-shaped recess 13 or may be short, and may be installed only at the position where bolts are tightened. In addition, the fixing of the dovetail member 14 and the fixing member 15 between the vertical streaks 16 is performed by fixing the dovetail member 14 and the fixing member 15 in advance and then sliding from the side surface of the cement plate 11 to the dovetail-shaped recess 13. May be inserted.

FIG. 4 shows another example of fixing the truss bar 12. The truss bar 12 is fixed by a fixing member 17 having a protrusion and a fixing member 18 having a protrusion and capable of being bolted. That is, two vertical ribs 16 are welded and fixed by a fixing member 17 having a projection and a fixing member 15 having no projection, and the vertical reinforcement 16 is welded and fixed to the truss reinforcement 12.

Fixing with the cement board 11 is performed by a fixing member 17
After the tip of the protrusion is hooked in the dovetail-shaped recess, the fixing member 18 that can be bolted is inserted into the dovetail-shaped recess facing the tip of the protrusion of the fixing member 17, and the fixing member 18 is fixed by the bolt. The truss lined cement plate of the present invention,
It is directly attached to the place where it is framed by steel bars, and the cement is placed in the form made of cement plates.

[0020]

According to the present invention, since truss bars are attached to the cement board, an extruded cement board having a light weight and a simple structure and easy to attach can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a cement board having truss bars in the present invention.

FIG. 2 is a perspective view showing the structure of truss muscles in the present invention.

FIG. 3 is a perspective view showing a state in which truss bars are attached to a cement plate via a connecting member in the present invention.

FIG. 4 is a perspective view showing another example of a state in which truss bars are attached to a cement plate via a connecting member in the present invention.

5A is a cross-sectional view showing a formwork wall built using a conventional wooden formwork, and FIG. 5B is a side view thereof.

[Explanation of symbols]

 1 panel 2 pier 3 control panel (plywood for concrete) 4 thick pipe 5 formwork clamp 6 separator 7 rebar 8 one side wall 9 return wall 11 cement plate 12 truss bar 120 lateral bar 13 dovetail groove 14 dovetail member 15 fixing member 16 Vertical stripes 17 Fixing member having a protrusion 18 Fixing member having a protrusion and capable of being bolted

Claims (3)

[Claims] 1. At least one strip-shaped dovetail-shaped recess is formed on the back surface.
An extruded cement board consisting of an individual cement board and a truss attached to the dovetail-shaped recess. 2. The extruded cement board according to claim 1, wherein the truss muscle and the dovetail member are fixed via a fixing member. 3. The extrusion-molded cement board according to claim 1, wherein the truss bar is fixed by a fixing member having a protrusion connected to the longitudinal bar and a fixing member having a protrusion and capable of being bolted.